Phytotoxicity and Benzoxazinone Concentration in Field Grown Cereal Rye (Secale cereale L.)

Table 2

Average growth stage (Feekes scale [39]) of different rye varieties observed at successive sampling dates during the first and second year of experiments (“Bonel” not used in the second year).

	Date	Average growth stage (Feekes scale)
		Aroostook	Bonel	Wheeler	Wrens Abruzzi
Year 1	37	3	3	3	3
	46	3	3	3	4
	56	4	4	3	4
	65	5	5	4	6
	84	9	9	8	10.1
	102	10.5	10.5	10.4	10.5
	121	10.54	10.54	10.53	10.54
Year 2	61	3	—	3	3
	70	3	—	3	4
	76	5	—	3	7
	83	7	—	4	8
	90	8	—	5	9